static async Task <int> MainAsync()
{
Console.WriteLine($"{DateTime.Now.ToLocalTime()}>\t The PumpSimulator Main() has started.");
SetupTelemetry();
try
{
RetrieveSettingsFromConfig();
var simulatorParameters = SimulatorParameters.Create();
(CancellationTokenSource cts, ManualResetEventSlim completed, Option <object> handler) = ShutdownHandler.Init(TimeSpan.FromSeconds(5), null);
Console.WriteLine(
$"Initializing simulated sensor to send {(SendUnlimitedMessages(messageCount) ? "unlimited" : messageCount.ToString())} "
+ $"messages, at an interval of {messageDelay.TotalSeconds} seconds.\n"
+ $"To change this, set the environment variable {MessageCountConfigKey} to the number of messages that should be sent (set it to -1 to send unlimited messages).");
moduleClient = await ModuleUtil.CreateModuleClientAsync(
protocol,
ModuleUtil.DefaultTimeoutErrorDetectionStrategy,
ModuleUtil.DefaultTransientRetryStrategy);
ModuleClient userContext = moduleClient;
reportedProperties = new TwinCollection();
await moduleClient.SetDesiredPropertyUpdateCallbackAsync(OnDesiredPropertiesUpdated, userContext);
await moduleClient.SetMethodHandlerAsync("reset", ResetMethod, null);
await moduleClient.SetMethodHandlerAsync("ping", PingMethod, null);
await moduleClient.SetMethodHandlerAsync("check", CheckMethod, null);
await moduleClient.SetInputMessageHandlerAsync("control", ControlMessageHandle, userContext);
await RetrieveSettingsFromTwin(moduleClient);
await SendEvents(moduleClient, messageCount, simulatorParameters, cts);
await cts.Token.WhenCanceled();
completed.Set();
handler.ForEach(h => GC.KeepAlive(h));
Console.WriteLine("SimulatedTemperatureSensor Main() finished.");
return(0);
}
catch (System.Exception ex)
{
Console.WriteLine($"{DateTime.Now.ToLocalTime()}>\t PumpSimulator Main() error.");
Console.WriteLine(ex.Message);
var telemetry = new ExceptionTelemetry(ex);
telemetryClient.TrackException(telemetry);
return(-1);
}
}
/// <summary>
/// Module behavior:
/// Sends data periodically (with default frequency of 5 seconds).
/// Data trend:
/// - Temperature regularly rises from 21C to 100C in regularly with jitter
/// - Pressure correlates with Temperature 1 to 10psi
/// - Suction Pressure stable around 5psi
/// - Discharge Pressure stable around 5psi
/// - Ambient temperature stable around 21C
/// - Flow is stable with tiny jitter around 25%
/// Method for resetting the data stream
/// </summary>
static async Task SendEvents(
ModuleClient moduleClient,
int messageCount,
SimulatorParameters sim,
CancellationTokenSource cts)
{
int count = 1;
double currentTemp = sim.TempMin;
double normal = (sim.PressureMax - sim.PressureMin) / (sim.TempMax - sim.TempMin);
while (!cts.Token.IsCancellationRequested && (SendUnlimitedMessages(messageCount) || messageCount >= count))
{
if (Reset)
{
currentTemp = sim.TempMin;
Reset.Set(false);
}
if (currentTemp > sim.TempMax)
{
currentTemp += Rnd.NextDouble() - 0.5; // add value between [-0.5..0.5]
}
else
{
currentTemp += -0.25 + (Rnd.NextDouble() * 1.5); // add value between [-0.25..1.25] - average +0.5
}
if (sendData)
{
var events = new List <MessageEvent>();
var deviceId = Environment.MachineName + "-" + Environment.GetEnvironmentVariable("DEVICE");
// Add Desired Number of Events into the Message
for (int i = 0; i < eventCount; i++)
{
events.Add(new MessageEvent
{
DeviceId = deviceId + "-" + i,
TimeStamp = DateTime.UtcNow,
Temperature = new SensorReading
{
Value = currentTemp,
Units = "degC",
Status = 200
},
Pressure = new SensorReading
{
Value = sim.PressureMin + ((currentTemp - sim.TempMin) * normal),
Units = "psig",
Status = 200
},
SuctionPressure = new SensorReading
{
Value = sim.PressureMin + 4 + ((currentTemp - sim.TempMin) * normal),
Units = "psig",
Status = 200
},
DischargePressure = new SensorReading
{
Value = sim.PressureMin + 1 + ((currentTemp - sim.TempMin) * normal),
Units = "psig",
Status = 200
},
Flow = new SensorReading
{
Value = Rnd.Next(78, 82),
Units = "perc",
Status = 200
}
});
currentTemp += -0.25 + (Rnd.NextDouble() * 1.5);
}
var msgBody = new MessageBody
{
Asset = Environment.GetEnvironmentVariable("ASSET") ?? "whidbey",
Source = Environment.MachineName,
Events = events
};
string dataBuffer = JsonConvert.SerializeObject(msgBody);
var eventMessage = new Message(Encoding.UTF8.GetBytes(dataBuffer));
eventMessage.Properties.Add("sequenceNumber", count.ToString());
eventMessage.Properties.Add("batchId", BatchId.ToString());
eventMessage.Properties.Add("asset", msgBody.Asset);
var size = eventMessage.GetBytes().Length;
if (debug)
{
Console.WriteLine($"\t{DateTime.Now.ToLocalTime()}> Sending message: {count}, Size: {size}, Body: [{dataBuffer}]");
}
else
{
Console.WriteLine($"\t{DateTime.Now.ToLocalTime()}> Sending message: {count}, Size: {size}");
}
try
{
if (insights)
{
telemetryClient.GetMetric("SendMessage").TrackValue(1);
telemetryClient.Context.Operation.Name = "Special Operation";
Metric sizeStats = telemetryClient.GetMetric("Special Operation Message Size");
sizeStats.TrackValue(size);
}
await moduleClient.SendEventAsync("temperatureOutput", eventMessage);
}
catch (Microsoft.Azure.Devices.Client.Exceptions.MessageTooLargeException exception)
{
Console.WriteLine(exception.Message);
if (insights)
{
telemetryClient.GetMetric("MessageSizeExceeded").TrackValue(1);
}
}
count++;
}
await Task.Delay(messageDelay, cts.Token);
}
if (messageCount < count)
{
Console.WriteLine($"Done sending {messageCount} messages");
}
}